If you have an allergy to antivenin (Lactrodectus mactans) or any other part of this drug.

If you have an allergy to horses or horse serum, talk with your doctor.

Tell your doctor if you are allergic to any drugs. Make sure to tell about the allergy and what signs you had. This includes telling about rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.

Precautions

Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.

Check all drugs you are taking with your doctor. This drug may not mix well with some other drugs.

Tell your doctor if you are pregnant or plan on getting pregnant.

Tell your doctor if you are breast-feeding.

Side Effects

Irritation where the shot is given.

Unsafe allergic effects may rarely happen.

Monitoring

Change in the health problem being treated. Is it better, worse, or about the same?

Follow up with the doctor.

Contact a healthcare provider

If you think there was an overdose, call your local poison control center or ER right away.

Signs of a very bad reaction to the drug. These include wheezing; chest tightness; fever; itching; bad cough; blue or gray skin color; seizures; or swelling of face, lips, tongue, or throat.

Feeling very tired or weak.

Any rash.

Side effect or health problem is not better or you are feeling worse.

General Statements

If you have a very bad allergy, wear an allergy ID at all times.

Do not share your drugs with others and do not take anyone else's drugs.

Keep all drugs out of the reach of children and pets.

Most drugs may be thrown away in household trash after mixing with coffee grounds or kitty litter and sealing in a plastic bag.

In Canada, take any unused drugs to the pharmacy. Also, visit http://www.hc-sc.gc.ca/hl-vs/iyh-vsv/med/disposal-defaire-eng.php#th to learn about the right way to get rid of unused drugs.

Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.

Call your doctor for help with any side effects. If in the U.S., you may also call the FDA at 1-800-FDA-1088 or if in Canada, you may also call Health Canada's Vigilance Program at 1-866-234-2345.

Talk with the doctor before starting any new drug, including OTC, natural products, or vitamins.

The information in this monograph is intended for informational purposes only, and is meant to help users better understand health concerns. Information is based on review of scientific research data, historical practice patterns, and clinical experience. This information should not be interpreted as specific medical advice. Users should consult with a qualified healthcare provider for specific questions regarding therapies, diagnosis and/or health conditions, prior to making therapeutic decisions.